Electric-light support



(No Model.)

A. DAWES. ELECTRIC LIGHT SUPPORT.

No. 444,424. Patented Jan. 13, 1891.

UNITED STATES PATENT OFFICE.

ALFRED DAlVES, OF CHELSEA, MASSACHUSETTS.

ELECTRIC-LIGHT SUPPORT.

SPECIFICATION forming part of Letters Patent No. 444,424, dated January13, 1891.

Application filed January 29, 1890. Serial No. 338,481. (No model.)

To all whom, it may concern.-

Be it known that I, ALFRED DAWES, of Chelsea, in the county of Suffolkand State of Massachusetts, have invented a new and useful Improvementin Electric-Light Supports, of which the following, taken in connectionwith the accompanying drawings, is a specification.

My present invention relates to supports for incandescent electriclights, is an improvement upon the inventions described in LettersPatent Nos. 394,680 and 414,7 98, granted to me December 18, 1888, andNovember 12, 1889, respectively; and it consists in certain novelfeatures of construction, arrangement, and combination of parts, whichwill be readily understood by reference to the description of thedrawings and to the claim hereinafter given, and in which my inventionis clearly pointed out.

Figure 1 is a side elevation of my improved support with the lampattached thereto. Fig. 2 is a front elevation of the coupling device forconnecting the lamp to the supportingarm, and Fig. 3 is a sectional planof same, the cutting plane being on line no a" on Fig. 2.

I have found in practice that when the incandescent lamp is suspended bymeans of the conducting wire or cord, so that it always hangs in avertical position, whether suspended from the end of either of mypatented supports or otherwise, it frequently happens that the shadowscast by the light detract very much from the usefulness of the light,and that ifthe lamp could be moved into a position at an angle to itsnormal or perpendicular position, according to the position of theobject upon which it is desirable to throw the light, this difficultywould be remedied, and hence I conceived the idea of pivoting the lampto the end of the supporting-rod by means of a clamping-joint, as shownin the drawings.

In the drawings, A is the incandescent lamp of ordinary construction, tothe upper end of which is firmly secured, by means of the clamping-screwa, the strap or saddle B, from the upper edge of which rise the two armsI) b, which embrace and are pivoted to the boss 0 on the closed end ofthe thimble G by means of the clamping-screw (1, so constructed andfitted that by tightening said screw the friction between the outersurfaces of the boss 0 and the inner surfaces of the upper ends of thearms 1 I) may be so increased that the lamp will be held in any positionto which it may be moved about the axis of the clamping-screw d, asindicated in dotted lines in Fig. 1.

The thimble O is fitted upon and firmly secured to the end of theadjustable rod of either of my patented supports hereinbefore referredto, and the connecting wire or cord e is made of sufficient length topermit the adj ustment of the supporting-rods to their greatest lengthand the movement of the lamp about the clamping-screw pivot (Z withoutbringing any strain on the wire.

The rod f is mounted in bearings in the eyes set in the rod 9, so thatit may be moved endwise and rotated therein, and is pressed against itsbearings by the spring h with sufficient force to retain it in anyposition in which it is placed in said bearings. By the employment ofthis coupling for connecting the lamp to the adjustable arm and rotationof the rodf the lamp may be placed in any desired position and retainedin said position by friction, so that the light may be thrown where itwill do the most good, which is a great advantage.

Another advantage is that all strain is removed from theconducting-wire, and as a consequence the insulation thereon will lastmuch longer than when the lamp is suspended thereby.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

In combination with an incandescent electric lamp and an adjustablesupporting-arm, a strap or saddle clamped to said lamp and provided withupwardly-projecting arms, a

thimble or socket secured to the end of said

